Jessica Biel, Emile Hirsch, and other eco-thinking celebs will climb 50 miles to raise awareness of the global clean water crisis.

Making clean water accessible to all often seems like such a huge, insurmountable mountain of a goal — but a handful of intrepid celebrities have set out climb it — literally! Jessica Biel, Emile Hirsch, and many more well-known faces and names have signed up to climb Kilimanjaro this month to raise awareness about — and money for — the global clean water crisis.

Dubbed Summit on the Summit, this collective feat begins Jan. 7, 2010 when the activists begin their week-long, 50-mile climb. The eco-adventurers will be wearing GPS trackers, so you’ll be able to see how your favorite celeb is doing by e-stalking them from afar on the nifty Summit on the Summit website, which will be constantly updated with photos, videos, and tweets.

Summit on the Summit was conceived by Grammy-nominated musician Kenna, who has a personal connection to the cause — His uncle died in childhood of a waterborne illness in Ethiopia. Kenna’s worked to attract a diverse group of climbers, including attention-getting celebs, “influencers” like Alexandra Cousteau (grand-daughter of Jacques-Yves Cousteau), photographers, scientists, and educators who’ll be sharing their knowledge about clean water issues throughout the climb.

Inspired to get involved? Check out Summit on the Summit’s online toolkit to help raise awareness about clean water issues using social media or to write a letter or email to President Obama. You can also sponsor a foot of the climb on the Summit on the Summit website by donating directly to the cause. All the funds raised will go towards The Children’s Safe Drinking Water Program, United Nations High Commissioner for Refugees (UNHCR), and Water For People’s Playpump Technology.